1 Ton of Refrigeration equals 12,000 BTU per hour.

Office AC Load Calculator (Commercial HVAC & VRF) – TR Requirement Tool

Office AC Load Calculator (Commercial HVAC & VRF)

This commercial HVAC calculator estimates the cooling load for office spaces based on floor area, occupancy, glass exposure and equipment heat load.

The calculator considers multiple heat sources in office buildings:

Area Load = Area × 60 BTU
People Load = Employees × 600 BTU
Glass Load = Glass Area × 150 BTU
Equipment Load = Computers × 400 BTU

Total Cooling Load = Sum of all loads

Required TR = Total BTU ÷ 12,000

Office Area = 2000 sq.ft
Employees = 20
Glass Area = 200 sq.ft
Computers = 20

Estimated Cooling Load ≈ 16–20 TR depending on heat gain.

This helps HVAC engineers estimate VRF or ductable system capacity for commercial offices.

Office Area (sq.ft) Number of Employees Glass Area (sq.ft) Number of Computers

Frequently Asked Questions

1. How do you calculate office AC load?

Office AC load is calculated based on area, occupancy, glass exposure and equipment heat load.

2. How many TR required for 2500 sq ft office?

Typically 18–22 TR is required depending on occupancy and glass area.

3. What is best system for commercial office cooling?

VRF systems are ideal for medium to large office spaces due to energy efficiency.

4. What is 1 TR in BTU?

1 Ton of Refrigeration (TR) equals 12,000 BTU per hour.

Office AC Load Calculator (Commercial HVAC & VRF)